Circulating means for boilers.



Patented Jan. 6, 1914.

3 SHEETS-SHEET 1.

R. D. JEPFREYS, GIRGULATING MEANS FOR BOILERS.

. APPLICATION PILED MAR. 22, 1911. 083,281

.Eigl.

COLUMBIA FLANOGRAPH (IO-,WASHINGTON. n. c.

R. D. JEFFREYS. -()IRGULATIIIG MEANS FOR BOILERS.

APPLICATION FILED MAR. 22, 1911;.

Patented Jan. 6, 1914.

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.. WASHINGTON cnLUMHIA P Patented Jan. 6, 1914.

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lllllllill' lt ll I ll R. D. 'JEPFREYS. CIRGULATING MEANS FOR BOILER S.

APPLICATION FILED MAR. 22, 1911.

COLUMBIA PLANOORAPH C0..WAsHINuTON, D. a

UNITED STATES A ROBERT D. JEFFREYS, OF NEW WINDSOR, NEW YORK, A

FFQE.

SIDNEY J. ROSS, AND OLIVER PRESCOTT MACFARLANE. ALL OF LONDON, ENGLAND.

CIRCULATING MEANS FOR BOILERS.

To all whom it may concern Be it known that I, ROBERT D. Jnrrnnys,

. a subject of the King of England, residing at New lVindsor, in theState of New York, have invented certain new and useful Improvements inCirculating Means for Boilers; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My present invention has relation to an improvement inmeansfor'promoting and directing the circulation of the water in steamboilers and thereby increasing the rate of making steam and preventingthe deposit of sediment in such parts of the boiler as would probably beinjuriously affected by its presence.

The invention is especially applicable to boilers having internal tubesfor hot gases, and is useful in those plants wherein a considerablenumber of such boilers are connected in a battery. 7

It is one advantage of my invention that it permits the circulatingdevice to be made independently of the boiler and to be applied at anyparticular portion of the interior thereof which may be indicated by thespecific conditions of use.

My invention is shown in one illustrative embodiment in the accompanyingdrawings, wherein Figure l is a longitudinal section of the device inplace, taken on the plane 11 in Fig. 2; Fig. 2 is a transverse sectionof the same taken on the plane 22 of Fig. 1; Figs. 3, 4-, 5 and 6 aredetail views of the housing plates; Fig. 7 is a battery of boilers ofthe type for which this device is particularly useful, and Fig. 8 is aside view of one boiler of said battery.

While my invention is intended for application to fire-tube boilers ingeneral, it is particularly adapted to use in connection with the formof boiler shown in the draw ings herewith. It is to be understood thatthe boiler bodies as illustrated in the drawings are longer Inproportion to their cliameter than is shown and this has been indicatedby cutting out cross sections of these bodies or shells, wherebyindefinite length is suggested.

In Fig. 1 the boiler shell 10 is supposed to be a portion of that shownin elevation Specification of Letters Patent.

Application filed March 22, 1911.

lMtt-entetl J an. 6, 191%. Serial No. 616,149.

in Fig. 8, the same being properly inclosed and supported over the gratebars 11 and combustion space 12. The hot gases, passing first backward,are intercepted by the wall 13 and return through the fire flues 14, tofind their way from the front of the boiler to the chimney (not shown).This is the arrangement of the well known return fine boiler to which myinvention is particularly adapted.

The principal object of my invention is to supply means whereby thenatural convective movement set up within the boiler shell may be madeto produce a circulation of the heated water so directed as to preventac-' cumulation of sediment in the hotter parts of the boiler, wheresuch accumulation would tend to cause burning of the shell. In mypreferred form this is so arranged as to cause actual removal of thesediment into a properly placed mud drum. To carry out these ends Iconstruct a housing directly over the hottest portion of the combustionspace, as for instance the rear of the firebox as shown in Fig. 1,whereby the convective action of the rising steam generated in thisquarter is concentrated and directed in the proper manner. The housingin question is preferably constructed substantially as shown in Figs. 1and 2, wherein there are employed two transverse partitions 15. and 16,extending entirely across the boiler shell, and so disposed as to leavea clear space above them and a clear space beneath them. The tensionrods 17 serve to unite these partitions.

Figs. 3 to 6 show the forms of unit plates which are preferablyemployedv to compose the partitions. The front partition 16 comprises alower member shaped, as shown in Fig. 3, to accommodate the fines andpro vided with a suitable lug 18, whereby it may be bolted to thefavorably curved lipplate 19 shown in Figs. 1 and 6. At the outer sidesof the fines 14 and extending partly over each, are the side platesshown at 9.0 in Figs. 2 and 5, which are suitably secured to the lowermember. The rear partition 15 is composed of parts similar to thosecomposing the front member, save that the center piece 21, shown in Fig.4 takes the place of the lip-plate 19 used in the forward partition.Inclined roofing plates 22 are bolted or otherwise made fast to the sidepieces 20 of the two partitions.

SSIGNOR TO HARRY SCHOFIELD,

The hood 23 is fixed to these side roofing plates and to the rearpartition, and is also preferably braced in front by the rod 24Lextending downward to engage the middle bracing rod 17. There is thuscomposed an adjustable knockdown housing which can be put togetherwithin the boiler and may be located at any point where the individuallocal conditions are best suited for it. The operation of this housingdepends upon the energy imparted by convection to the water over thehottest part of the fire. The upward current produced by convectionbeneath the housing draws the water from front and back under thepartitions 15 and 16, as indicated by the arrows, and causes it toimpinge upon the inclined hood 23 whereby a strong current is producedin a forward direction over the lip-plate as shown by the arrows. Thecurrent along the bottom of the boiler prevents any accumulation ofsediment in the hotter parts of the boiler. I prefer to provide in thisconnection special means adapted to cooperate with the circulating meansshown for gathering the sediment, and I have illustrated this in Figs.1, 7 and 8 in connection with long return flue boilers arranged in agroup or battery. In this arrangement the associated boiler shells 10are placed parallel over the fire box and combustion space, and areunited by a transverse shell 25 V tending transversely under the boilershells 10 are two mud drums 26 and 27, connected with said shells byappropriate passages.

The natural tendency of much of the sediment is to collect at the rearend of each boiler shell, where it will settle into the rear mud drum26. I prefer, however, to supply the supplemental drum 27 nearer thefront of the boiler shells, and to employ a mud diverter 28 at theentrance of said supplemental. mud drum, which diverter stands directlyin the main current approaching the circulator-housing. Any mud, carriedalong by this main current is thus caught by the diverter and turnedinto the supplemental drum.

It will be seen that my improvement supplies a simple and inexpensivemeans, applicable to a variety of boiler types. and

constituting the steam drum. Ex-

adjustable within boilers already erected,

whereby efficient circulation is promoted; thereby increasing therapidity of steam output and controlling the means for removal ofsediment.

Various changes may be made in this device without departing from thescope of my invention, and I do not limit myself to the details shownand described.

hat I claim is- 1. In a boiler having. internal flues, a knockdowneirculator-housing comprising in combination a pair of suitably shapedplates (15 and 21) extending substantially across the boiler andembracing the lines at one end of the housing, said plates extending toa point well below said fines, suitably shaped plates (16 and 19)embracing said flues at the opposite end of the housing, suitable staysuniting the two sets of plates, at top plate attached to the upperportion of said first named set of plates, and extending across. saidfines and inclining upward therefrom over the top of the housing in alongitudinal direct-ion, substantially as described.

2. In a boiler having internal fines, a circulator-housing embracing thefine or fines near the hottest part of the boiler and extending belowsaid flue or fines and forming a passage so directed as to drive thewater in one direction longitudinally along the top over the fines andto ard a cooler portion of the boiler, a mud drum below the main boilerand situated in a cooler port-i f the furnace, a passage leading downflfll the main boiler to said. mud drum, said passage being between thecooler end of the boiler and the bottom of said housing and out of theline of circulation of the water, and a diverter at the opening of saidmud drum and on that side of the same nearest the housing, said diverterbeing substantially in line of travel of the circulating water towardthe underside of the housing, substantially as described.

In testimony whereof, I have aflixed my signature, in presence of twowitnesses.

ROBERT D. JEFFREYS.

i tnesses H. S. MAoKAYn, L. F. LITTLE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatent

